WCDMA反向突發(fā)兩級相關(guān)快速捕獲算法
Twice-Correlate Rapid Acquisition Algorithm for Synchronization of PRACH Preamble in WCDMA Reverse Link
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摘要: 該文針對WCDMA反向隨機(jī)接入信道前置同步碼的多碼限時捕獲特點，提出了一種低復(fù)雜度的兩級相關(guān)捕獲電路，給出了快速捕獲算法。該算法對多徑信號進(jìn)行聯(lián)合處理，由于利用了多徑信息，分析和數(shù)值結(jié)果表明該算法在多用戶多徑衰落環(huán)境下能獲得比單徑衰落時更好的捕獲性能。
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關(guān)鍵詞:
- WCDMA反向鏈路; 碼捕獲; 檢測概率
Abstract: A twice-correlate code-acquisition circuit and a rapid acquisition algorithm are proposed according to the characteristics of multi-code and time-limited acquisition for Phys-ical Random Access Channel (PRACH) preamble part in WCDMA reverse link. Compared with the conventional matched-filter and parallel acquisition methods, this scheme has lower complexity with fast series correlate calculation for multiple codes in the fcwice-correlate cir-cuit. The proposed acquisition algorithm uses the information of multiple paths to achieve higher detection probability in multi-path fading environments than that in single patli fad-ing channel. Performance analysis with theory expressions and numerical results is provided. -
Hyung-Rae Park,Bub-Joo Kang.On the performance of a maximum-likelihood code-acquisition technique for preamble search in a CDMA reverse link[J].IEEE Trans.on Vehicular Technology.1998,47(1):65-74[2]Krzymien W A,Jalali A,Mermelstein P.Rapid acquisition algorithms for synchronization of bursty transmissions in CDMA microcellular and personal wireless systems[J].IEEE Journal on Selected Areas in Communications.1996,14(3):570-579[3]Zhuang Weihua.Noncoherent hybrid parallel PN code acquisition for CDMA mobile communications[J].IEEE Trans.on Vehicular Technology.1996,45(4):643-656[4]De Gaudenzi R,Giannetti F,Luise M.Signal recognition and signature code acquisition in CDMA mobile packet communications[J].IEEE Transaction on Vehicular Technology.1998,47(1):196-208[5]3GTS25.213,3GPP DOCUMENT,MAR.2000. -
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